For this element, for actinium, and for polonium, but for none of the others, are the criteria of unique spectrum and chemical character, as found for radium, to be (Continued on page 77) Prof. S ...

The widely used chemical, a type of orthophosphate, is intended to counter high lead levels detected in thousands of D.C. homes since 2002 but only made public in January.

American Chemical Society Summary: Consuming lead can cause health problems for anyone, but children are particularly vulnerable because the element can interfere with their growth and development.